V1-1's are engineered to be leak-free, maximize flow and reduce the overall cost of ownership. So confident of their performance, only ValvTechnologies' V1-1 valves are backed by the best four year, zero-leakage warranty in the industry*.
Backpressure protected sealing. Standard with the V1-1 valves, the design prevents the upstream spring from collapsing in a reverse flow condition, protecting the internals from damage and guaranteeing shutoff in the reverse direction.
Requirement: Immediate shipment of a V1-1 metal seated ball valve for main steam draining was required to avoid extended outage time.
Result: Receiving the emergency request on Saturday, ValvTechnologies quickly assembled a cross-functional team to provide the power plant with an immediate solution. Representatives from the Shipping, Warehouse and Service departments were called to the Houston office to solve the customer's issue. The ValvTechnologies' team was able to identify, assemble, test and ship a replacement V1-1 valve by the end of day Saturday, the very same day the emergency request was received.
The customer received the V1-1 valve Monday morning and immediately installed it. The new valve functioned perfectly and the customer was able to go back online, saving thousands of dollars in potential down time and revenue loss.
Background: Power plants around the world commonly use ball valves to control high-pressure spray water in their cooling towers. In these towers, water is sprayed through pressurized nozzles for cooling and reuse. A power plant in Poland was utilizing globe valves instead of ball valves for their spray water control. Their particular application required the valves to open and close at rapid speed. For this application, the globe valves were failing continuously, resulting in control loss of the spray water and decrease in plant efficiency. Additionally, the globe valves' stem packing was tearing, causing high-pressure, high-temperature water to be sprayed around the malfunctioning valves, creating a dangerous environment for operating staff.
Requirement: The customer requested ValvTechnologies review their spray water application and recommend an alternative solution that would replace their bare stem valves but keep the existing actuators and positioners. They also required each gearbox be replaced and changed to rotating movement from linear movement. Additionally, all valves provided were required to be in accordance with FED and CE requirements. Most importantly, the plant required each valve to function without issue and without the replacement of any stem packing for a period of one year from the date of install.
Solution: The ValvTechnologies' high-performance V Series ball valve was identified as the best solution for this application. Per the customer's specification, eight V1-1 valves were installed to replace the existing globe valves. After one year of operation, ValvTechnologies inspected the eight valves using an endoscope and found no sign of erosion or stem-packing problems. See photo 1 and 2 below. Plant management has approved the replacement of all globe valves used for spray water control to ValvTechnologies' V Series ball valves. ValvTechnologies' provided this customer with the best total cost of ownership solution available. ValvTechnologies was able to eliminate an unsafe environment, increase the quality of the spray system and improve plant efficiency.
Background: A low-carbon economy is a concept that refers to an economy which has a minimal output of greenhouse gas emissions into the biosphere, specifically greenhouse gas, carbon dioxide (CO2). A power station near the town of Selby, England, is the largest, cleanest and most efficient coal burning power station in the United Kingdom. With a generating capacity of 3,960 megawatts, its current output levels generates enough electricity to meet the needs of seven percent of the United Kingdom. Understanding they have a very important role to play in the transition towards a low-carbon economy, this power station is committed to reducing hazardous emissions and has various projects ongoing which will not only reduce emissions, but deliver significant savings.
Solution: Severe service valve leakage significantly reduces a plant's heat rate performance, because BTUs leak away, never reaching the turbine. By utilizing ValvTechologies' V Series metal seated ball valves and IsoTech® parallel slide gate valves for vents and drains, steam and water leakage is eliminated, improving the plant's thermal efficiency. Additionally, less fuel is burned to produce megawatts, which not only leads to lower emissions, but improved plant efficiency.ValvTechnologies' high-performance zero-leakage isolation valves typically improve a plant's heat rate performance by 1-2%, even up to 5-6% in some cases. In 2004 ValvTechnologies began suppling this power station with V Series severe service ball valves for problem areas such as drains and bypasses.
Result: Due to the V Series valves reliability of isolation provided on the plant's drains and bypasses, the plant began using ValvTechnologies' IsoTech® valves their feed waters systems (start and standby feed pumps, HP heater feed inlet and outlets). The feed system pumps powerfully move water at a rate of 150 gallons every second. The IsoTech® valves provided single isolation, allowing maintenance to be carried out on tube leaks without shutting down the entire system. ValvTechnologies' zero-leakage valve range is seen as a solution provider where isolation is required for critical and severe service applications, and the way forward in helping achieve the targets set for reducing emissions.
It is critical to chose the correct valve specifications when it comes to attemperator block valves. When zero leakage is demanded for improved plant heat rate efficiency and for overall increased megawatt output, ValvTechnologies offers its' V series, zero leakage, metal seated ball valve for attemperator spray block valve applications.
Specialty industries: Other industry solutions available. Contact the factory for more information.